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Finding the Fourth Proportional to 391,841.94, 587,679.32 and 125,530.94

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Solution

The fourth proportional to 391,841.94, 587,679.32 and 125,530.94 is: 188,269.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,841.94 : 587,679.32 = 125,530.94 : x
  2. Step 2: Convert to fraction form
    391,841.94/587,679.32 = 125,530.94/x
  3. Step 3: Cross multiply
    391,841.94x = 587,679.32 × 125,530.94
  4. Step 4: Simplify right side
    391,841.94x = 73,771,937,458.16
  5. Step 5: Solve for x
    x = 73,771,937,458.16/391,841.94
  6. Step 6: Final answer
    x = 188,269.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.